Attachment for engine-lathes.



H. NEWMANN- ATTACHMENT FOR ENGINE LATHES.

APPLICATION FILED FEB.10,1912.

:iD@319,, 956B Patented July 9,1912.

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I R I ywwm -\-v A T TOR/V5 M H. NEWMANN. v ATTACHMENT FOR ENGINE LATHES. APPLICATION FILED FEB. 10, 1912.

L3L95fi Patented July 9, 1912.

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yg 711mm v 353 KWLQ -2 ATTO 1115M HERMANN NEWMANN, OF NEW YORK, N. Y.

ATTACHMENT FOR ENGINE-LATHES.

Specification of Letters Patent.

Patented Jnlyt 1912.

Application filed. February 10, 1912.- Serial No. 676,765).

T all whom 1' 2? may concern Be it known that I, Hnnnnnn Nmvnann, a citizen of Germany, residing at New York city, county and State of New Y rk, have invented a new and Improved Turret Attachment for Engine-Lathes, of which the following is a specification.

This invention relates to a turret attachment of novel construction, more particularly adapted to be secured to the, slide rest of an engine lathe; The turret attaclnnent may he readily centered opposite the lathe spindle, and carries ditlerent groups of tools which are secured in position in a novel manner and are adapted to be readily brought into their working position.

in the accom -ranying drawing: Figure 1 is a vertical section of a turret attachment embodying my invention; Fig. 2 a side elevation thereof; Fig. 3 a face view; Fig. 4 a section on line 4-l,Fig-. 2, looking to the left; Fig. 5 a section on line 5 5, Fig. 2, looking to the right,'and Fig. 6 a section on line -6, Fig. 3. i

A block 10 of approximately cylindrical form is provided with an axial bore adapted to accommodate a horizontal spindle 11 that extends at both ends a distance beyond the block. At its bottom, block 10 has a threaded recess 12 engaged by a correspondingly threaded annulus 13 which is provided with spanner holes 14 and is supported upon the slide rest 15. At right angles to spindle 11 there extends through block 10, a screw 16 having a central aperture or eye 17 of such a size as to freely accommodate the spindle. The upper shank of screw 16 passes outwardly throiiglzi a ('Lmtraeted neck of block 10 and carries a nut 18. The lower shank of the screw is engaged by a threaded sleeve 19 loosely fitted Within annulus 13 and provided with a lower downwardly extending head 20 that is received by the longitudinal groove 21 of slide rest. 15. If spindle ii is to be raised or lowered, nut 18 is first slackened, so as to lower screw 16 and loosen the hold of head 20 on slide rest 15, such movement of the screw being permitted owing to the play of spindle 11 in aperture 17. The entire device is now drawn outof the slide rest, sleeve 19 and annulus 13 are turned to raise or lower block it) to the extent desired, the device is refitted to the slide rest and nut 18 is tightened up.

The forward end of spindle 11 carries a collar 22 countersunk in the back 23 of a cup-shaped tool carrier or head 2 which is fast on the spindle and rotatable therewith. llcad L t is provided with means for holding two ditierent groups of tools, such i'neans alternating with each other and being adapted to pres nt the tools respectively in parallelism and at an inclination to the spindle axis. -l hc .n'st named means comprise a series of cylindricalbores 25 arranged in a circle and extending in an axial direction, each bore heirg tapped tor the reception of a clamp screw 26. The second named means comprise a series of surface grooves 27 formed ii'iterinediz'ite b res 2J3 andextending outwardly at an obtuse angle to the spindle axis. Zach grooveQT is formed with flaring outer and inner ends and with a circular section intermediate said ends. This circular section :u-connnodates the transversely bored head in of a tool holder, sa l head extending into a recess-29 coinmimicating with groove 27 and ha ing a slant which corresponds to that oi the groove. The tubular shank so of the tool holder extends obliquely backward through head :2 and is provided with an inner thread circa-fed by a clamp screw 23 adapted to impil'igc :lljttiIiSt the shank of the tool titted into-the bore of head 28. The outer exposed end of shank 30 is likewise threaded tor the reception of a jam nut. 32. To insert a tool 33. this nut is slackene'd, head 2h is advanced out of re cess 2f), the tool shank is inserted into the head and tightened up by screw 31 and then nut: 32 is manipulat into the recess and m the efiposed portions of the shank against. the base of groove 27. Set screws 34- extending through head 24 at an angle to grooves 27 take up the strain on the, tools and permit the latter to be adjusted from time to time'ao the tool bits Lo draw the head back wear off, the necessary lateral play of the tool shanks during this manipulation being permitted by the flaring ends of the grooves.

Means are provided for giving to spindle 11. an axial turn. wl'ienevcr a new tool is to he presented to the work; These means eonsi t ot a clamp nut 33 titted upon the rearwardly protruding threaded end of the spindle and cngagingthc rear side of block 10. The inner or forward section of this nut is encompassed by a freely rotatable ring 36 having bearings -37 to which is pivoted at. 38 a (log-fit) having handle 40. This dog is adapted to cngagc either one of a plurality of transverse grooves 41 formed in the outer or rear section of nut. 35. The extreme outer end of spindle 11 carries a radial pin 42 which is adapted to engage an axially disposed pin 43 of nut 35, so that the movement; of the latter may be transmitted to the former.

At its forward end, block 10 is provided with a flange 44 notched as at t5 for the accommodation of a forwardly extending pawl 46 influenced by a spring 47. This pawl is adapted to engage either one of a series of notches 48 formed in the back 23 of head 24, said notches corresponding in number and spacing to the different tool holding means 25, 27 formed in said head.

Whenever a different tool is to be placed into the operative position, dog 39 is turned sidewise by handle 40 to slacken nut The dog is then thrown out of engagement with the nut and the latter is manually turned to the extent desired to impart a corresponding rotation by pins 43, 42 to spindle 11 and consequently to head 24, the proper alinement of the tool being insured by the engagement of pawl 1-6 with the notch 48' corresponding to said tool. After the desired change has been effected, nut 35 is again tightened up to lock the head in the position to which it has been set.

I claim:

l. A turret for lathes comprisinga block, a spindle journaled therein, a tool-carrying head secured to the spindle, a. screw extending through the. block and having an eye that accon'imodates the spindle,and a thread ed sleeve engaging the screw, said sleeve having a head adapted to engage a slide rest.

2. A turret for lathes comprising a block, a spindle journaled therein, a tool-carrying head secured to the spindle, a screw extending through the block and having an eye adapted to loosely accommodate the spindle and permit a play of the spindle within the eye, a not carried by one end of the screw, a threaded. sleeve engaging the other end of the screw and a head on said sleeve that is adapted to engage'a slide rest.

3. A turret for lathes comprising a block, a spindle journaled therein, a threaded annulus engaging the block, a screw extending through the block and having an eye adapted to accommodate the spindle, a nut carried by one end of the screw, a threaded sleeve engaging the other end of the screw and encompassed by the annulus, said sleeve being provided with a head adapted to engage a slide rest.

4. A turret for lathes comprising a block, a spindle journaled therein, a head carried by the spindle, a plurality of grooves formed in the head and inclined at an obtuse angle to the spindle axis, recesses in the head that open into said grooves, a plurality of apertured tool holders acconv modated within said grooves and projecting rearwardly intothe recesses, and means for locking said tool holders within said recesses.

5. A turret for lathes comprising a block a spindle journaled therein, a head carried by the spindle, a plurality of grom'es formed in said head and having flaring ends and circular central sections, recesses comn'ninicating with said central sections, a plurality o1 apertured tool holders engaging said central sections and adapted to enter the recesses, and means for locking said tool holders within said recesses.

6. A turret forlathes comprising a block, a spindle journaled therein, a head carried by the spindle, a plurality of grooves formed in said head and having flaring ends and circular central sections, recesses communicating with said central sections, a plurality of apertured tool holders engag ing said central sections and adaptec to enter the recesses, means for locking said tool holders within said recesses, and a plurality of set screws extending through the head at an angle to the grooves.

7 A turret for lathes comprising a block, a spindle journaled therein, a screw extending through the block and having an eye that accommodates the spindle, a threaded sleeve that engages the screw and is adapted to be engaged by a slide rest, ahead secured to the spindle and having a plurality of tool holders, and means for clamping the spindle to the block.

HERMANN NEVVMANN.

Witnesses FRANK v. BRIESEN, KATHERYNE Koon. 

